Hide your valuables in plain sight with this clever book safe. Secure the lock with the key and place it on your bookshelf for a secret hiding spot. The front and back covers are made of thick cardboard like a real book, but inside is a metal safe that locks with a key included. The inside safe storage space measures 5 1/4"L x 2"W x 9"H. ABS plastic, iron and paper. Two keys included. 6 1/4"L x 2"W x 9"H.